<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <!-- 行 -->
        <el-col>
          <!-- 列 -->
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop','vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
            >编辑</el-button>
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
            >删除</el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配角色</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色对话框 -->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="70px"
        class="demo-ruleForm"
      >
        <el-form-item label="角色名称" prop="roleName" label-width="80px">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc" label-width="80px">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form ref="editFormRef" :model="editForm" :rules="editFormRules" label-width="70px">
        <el-form-item label="角色名称" prop="roleName" label-width="80px">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc" label-width="80px">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog title="提示" :visible.sync="setRightDialogVisibles" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisibles = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  //数据
  data() {
    //对象
    return {
      //所有角色列表数据
      rolelist: [],

      //控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      // 添加角色的表单数据
      addForm: {
        roleName: "",
        roleDesc: ""
      },
      //添加表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: "请输入角色名", trigger: "blur" }
        ],
        roleDesc: [{ required: true, message: "请输入描述", trigger: "blur" }]
      },

      //控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      //查询到的用户信息对象
      editForm: {},
      //修改表单的验证规则对象
      editFormRules: {
        roleName: [{ required: true, message: "请输入角色", trigger: "blur" }],
        roleDesc: [{ required: true, message: "请输入描述", trigger: "blur" }]
      },

      //控制分配权限对话框的显示与隐藏
      setRightDialogVisibles: false,
      //所有权限数据
      rightslist: [],

      //树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      },
      //默认选中的节点Id值数组
      defKeys: [],
      //当前即将分配权限的角色id
      roleId: ''
    };
  },
  //生命周期函数
  created() {
    //获取所有角色列表数据
    this.getRolelist();
  },
  methods: {
    //获取所有角色的列表
    async getRolelist() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败！");
      }
      this.rolelist = res.data;
      console.log(this.rolelist);
    },
    //监听添加用户对话框的关闭事件
    addDialogClosed() {
      //清空表单数据
      this.$refs.addFormRef.resetFields();
    },
    //点击按钮添加新角色
    addRole() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return;
        //可以发起添加角色的网络请求
        const { data: res } = await this.$http.post("roles", this.addForm);
        if (res.meta.status !== 201) {
          this.$message.error("添加角色失败！");
        }
        this.$message.success("添加角色成功!");
        //隐藏添加角色的对话框
        this.addDialogVisible = false;
        //重新获取角色列表数据
        this.getRolelist();
      });
    },
    //根据id删除对应的角色信息
    async removeRoleById(id) {
      //弹框询问是否删除角色数据
      const confirmResults = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      //如果确认删除，则返回值为字符串 confirm
      //如果取消了删除，则返回值为字符串 cancel
      if (confirmResults !== "confirm") {
        return this.$message.info("已取消删除");
      }
      //确认删除
      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("删除用户失败!");
      }
      this.$message.success("删除用户成功！");
      this.getRolelist();
    },
    //展示编辑角色的对话框并获取数据
    async showEditDialog(id) {
      const { data: res } = await this.$http.get("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("查询用户失败!");
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //监听修改角色对话框的关闭事件
    editDialogClosed() {
      //清空表单数据
      this.$refs.editFormRef.resetFields();
    },
    //点击确认修改角色信息并提交
    editUserInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return;
        //发起修改用户信息的数据请求
        const { data: res } = await this.$http.put(
          "roles/" + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("更新角色信息失败！");
        }
        //关闭对话框
        this.editDialogVisible = false;
        //刷新数据列表
        this.getRolelist();
        //提示修改成功
        this.$message.success("更新角色信息成功！");
      });
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      //获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      //判断是否为200
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败！");
      }
      //把获取到的权限数据保存到data 中
      this.rightslist = res.data;
      console.log(this.rightslist);
      //递归获取三级节点的Id
      this.getLeafKeys(role,this.defKeys);
      this.setRightDialogVisibles = true;
    },
    //通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys (node, arr) {
      //如果当前 node节点不包括children 属性， 则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item,arr))
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    //点击为角色分配权限
   async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr =keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if (res.meta.status !== 200){
        return thsi.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功!')
      this.getRolelist()
      this.setRightDialogVisibles =false
    },
    //根据Id删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除！");
      }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败!");
      }

      // this.getRolelist();
      role.children = res.data;
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  //纵向对齐
  display: flex;
  align-items: center;
}
</style>